The president has repeatedly hit Wolff on the book, which contains several explosive claims about the president and the administration.

Wolff writes that several people close to Trump in the White House have questioned his mental fitness to serve as president. The claim as sparked renewed interest in the media on Trump's mental health.

The president's comments were his first public comments since a false mobile alert was sent in Hawaii warning people of an incoming missile.

5. Bet Hillary & others are happy

Gee, we haven't heard about crooked Hillary, or sneaky Dianne, or the size of the inauguration crowd, or the margin of electoral college victory, or the most beautiful piece of chocolate cake. Thank you, Michael Wolff.